Sponge mop



FIG. 1 is a front perspective view of a sponge mop showing our new design;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof; and

FIG. 5 is a top plan view thereof.

The conventional handle has been shown fragmentarily in all views for ease of illustration. 

The ornamental design for a sponge mop, as shown and described. 